TM-9-2320-283-20-1

TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3

DECEMBER 1983

TM-9-2320-283-20-1 - Page 453 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

137.

EXCESSIVE JERKING OF TOWED TRAILER.

Step 1.

Check for proper lubrication of fifth wheel.

Lubricate.

(Refer to LO 9-2320-283-12).

Step 2.

Check bolts and brackets on fifth wheel for tightness.

Tighten and torque (para 3-245).

Step 3.

Inspect coupler jaw and locks for damage.

Replace fifth wheel (para 3-245).

138.

EXCESSIVE NOISE OR POPPING SOUNDS FROM FIFTH WHEEL WHEN TURNING.

Step 1.

Check for proper lubrication of fifth wheel.

Lubricate.

(Refer to LO 9-2320-283-12).

Step 2.

Check all mounting bolts on fifth wheel for tightness.

Tighten and torque (para 3-245).

Step 3.

Inspect locks for damage.

Replace fifth wheel (para 3-245).

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